18 Questions
What is the role of a primary key field in a table?
It remains a primary key in the original table
What type of words often describe relationships between entities?
Verbs
What is the purpose of a conceptual data model?
To model the business objects in a system
What is an attribute in the context of a data model?
A characteristic of an entity
What is the relationship between a primary key and a foreign key?
A foreign key is a primary key in another table
What is the role of a data modeler?
To model the business objects in a system
What is the primary purpose of a Logical Data Model?
To establish the relationships between data elements
What type of entity is typically introduced in a Logical ERD?
Associative entity
What aspect of a database is considered when developing a Physical Data Model?
The convention and restriction of the DBMS
What is the main difference between a Logical ERD and a Physical ERD?
The column types and lengths
What is the purpose of a Conceptual ERD?
To provide a high-level overview of the database
Which model is responsible for managing many-to-many relationships?
Logical ERD
What is the primary purpose of an Entity Relationship Diagram (ERD)?
To describe an overall design concisely yet accurately
What is an instance of an entity in a database?
A record or row in a table
What is the characteristic of a primary key in a database?
It identifies uniquely every row
What is the purpose of a foreign key in a database?
To link two tables together
What are the three components of an Entity Relationship Diagram (ERD)?
Entities, Attributes, and Relationships
What is an attribute in a database?
A fact or description of an entity
Understand the basics of database relationships, primary and foreign keys, and how they are used to link tables. Learn about entity attributes and how they become columns in a table. Test your knowledge of data modeling and database design.
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